<template>
  <div class="cart">
      <order-header title="我的购物车">
          <template v-slot:tip>
            <span>温馨提示：产品是否购买成功，以最终下单为准，请尽快结算</span>
          </template>
      </order-header>
      <div class="wrapper">
        <div class="container">
          <div class="cart-box">
            <ul class="cart-item-head">
              <li class="col-1">
                  <span 
                    class="checkbox" 
                    :class="{'checked':allChecked}"
                    @click="toggleAll"
                  >
                  </span>全选</li>
              <li class="col-3">商品名称</li>
              <li class="col-1">单价</li>
              <li class="col-2">数量</li>
              <li class="col-1">小计</li>
              <li class="col-1">操作</li>
            </ul>
            <ul class="cart-item-list">
              <li class="cart-item" v-for="item of list" :key="item.id">
                <div class="item-check">
                  <span 
                    class="checkbox" 
                    :class="{'checked':item.productSelected}"
                    @click="undateCart(item)"
                  ></span>
                </div>
                <div class="item-name">
                  <img v-lazy="item.productMainImage" alt="">
                  <span>{{item.productName + ' , ' + item.productSubtitle}}</span>
                </div>
                <div class="item-price">{{item.productPrice}}</div>
                <div class="item-num">
                  <div class="num-box">
                    <a href="javascript:;" @click="undateCart(item,'-')">-</a>
                    <span>{{item.quantity}}</span>
                    <a href="javascript:;" @click="undateCart(item,'+')">+</a>
                  </div>
                </div>
                <div class="item-total">{{item.productTotalPrice}}</div>
                <div class="item-del" @click="delProduct(item)"></div>
              </li>
            </ul>
          </div>
          <div class="order-wrap clearfix">
            <div class="cart-tip fl">
              <a href="/#/index">继续购物</a>
              共<span>{{list.length}}</span>件商品，已选择<span>{{checkedNum}}</span>件
            </div>
            <div class="total fr">
              合计：<span>{{cartTotalPrice}}</span>元
              <a href="javascript:;" class="btn" @click="order()">去结算</a>
            </div>
          </div>
        </div>
      </div>
      <service-bar></service-bar>
      <nav-footer></nav-footer>
  </div>
</template>

<script>
import  OrderHeader from '@/components/OrderHeader'
import NavFooter from '@/components/NavFooter'
import ServiceBar from './../components/ServiceBar'
export default {
    name:'cart',
    components:{
        OrderHeader,
        NavFooter,
        ServiceBar
    },
    data(){
        return{
            list:[],//商品列表
            allChecked:false,//是否全选
            cartTotalPrice:0,//总金额
            checkedNum:0,//选中商品数量
        }
    },
    methods:{
        getCartList(){//获取数据
            this.axios.get('/carts').then((res)=>{
               this.renderData(res);
            })
        },
        toggleAll(){//全选or全不选
            let url=this.allChecked?'/carts/unSelectAll':'/carts/selectAll'
            this.axios.put(url).then((res)=>{
                this.renderData(res);
            })
        },
        renderData(res){
            this.list=res.cartProductVoList||{};
            this.allChecked=res.selectedAll;
            this.cartTotalPrice=res.cartTotalPrice;
            this.checkedNum=this.list.filter(item=>{
                return item.productSelected
            }).length;
        },
        undateCart(item,type){//加减数量更新数据
            let quantity=item.quantity,
                selected=item.productSelected;
            if(type=='-'){
                if(quantity==1){
                    this.$message({
                  showClose: true,
                  message: '商品至少保留一件',
                  type: 'warning'
                });
                    return;
                }
                --quantity;
            }else if(type=='+'){
                if(quantity>item.productStock){
                    this.$message({
                  showClose: true,
                  message: '购买商品不能超过库存数量',
                  type: 'warning'
                });
                    return;
                }
                ++quantity;
            }else{
                selected=!item.productSelected;
            }
            this.axios.put(`/carts/${item.productId}`,{
                quantity,
                selected
            }).then((res)=>{
                this.renderData(res);
            })
        },
        delProduct(item){//删除商品
            this.axios.delete(`/carts/${item.productId}`).then((res)=>{
                this.renderData(res);
            })
            this.$message({
                  showClose: true,
                  message: '删除成功',
                  type: 'success'
                });
        },
        order(){//购物车下单
            let isCheck=this.list.every(item=>{
                return !item.productSelected;
            });
            if(isCheck){
               this.$message({
                  showClose: true,
                  message: '请至少添加一件商品',
                  type: 'warning'
                });
            }else{
                this.$router.push('/order/confirm')
            }
        }
    },
    mounted(){
        this.getCartList();
    }
}
</script>

<style lang="scss">
.cart{
    .wrapper{
      background-color:#F5F5F5;
      padding-top:30px;
      padding-bottom:114px;
      .cart-box{
        background-color:#fff;
        font-size:14px;
        color:#999999;
        text-align:center;
        .checkbox{
          display: inline-block;
          width: 22px;
          height: 22px;
          border: 1px solid #E5E5E5;
          vertical-align: middle;
          margin-right: 17px;
          cursor:pointer;
          &.checked{
            background:url('/img/icon-gou.png') #FF6600 no-repeat center;
            background-size:16px 12px;
            border:none;
          }
        }
        .cart-item-head{
          display:flex;
          height: 79px;
          line-height: 79px;
          .col-1{
            flex:1;
          }
          .col-2{
            flex:2;
          }
          .col-3{
            flex:3;
          }
        }
        .cart-item-list{
          .cart-item{
            display:flex;
            align-items:center;
            height:125px;
            border-top:1px solid #E5E5E5;
            font-size:16px;
            .item-check{
              flex:1;
            }
            .item-name{
              flex:3;
              font-size: 18px;
              color: #333333;
              display: flex;
              align-items: center;
              img{
                width:80px;
                height:80px;
                vertical-align:middle;
              }
              span{
                margin-left: 30px;
              }
            }
            .item-price{
              flex:1;
              color:#333333;
            }
            .item-num{
              flex:2;
              .num-box{
                display:inline-block;
                width:150px;
                height:40px;
                line-height:40px;
                border:1px solid #E5E5E5;
                font-size:14px;
                a{
                  display:inline-block;
                  width:50px;
                  color:#333333;
                }
                span{
                  display:inline-block;
                  width:50px;
                  color:#333333;
                }
              }
            }
            .item-total{
              flex:1;
              color:#FF6600;
            }
            .item-del{
              flex:1;
              width:14px;
              height:12px;
              background:url('/img/icon-close.png') no-repeat center;
              background-size:contain;
              cursor:pointer;
            }
          }
        }
      }
      .order-wrap{
        font-size:14px;
        color: #666666;
        margin-top: 20px;
        height: 50px;
        line-height: 50px;
        .cart-tip{
          margin-left: 29px;
          a{
            color: #666666;
            margin-right:37px;
          }
          span{
            color:#FF6600;
            margin:0 5px;
          }
        }
        .total{
          font-size:14px;
          color:#FF6600;
          span{
            font-size:24px;
          }
          a{
            width:202px;
            height:50px;
            line-height:50px;
            font-size:18px;
            margin-left:37px;
          }
        }
      }
    }
  }
</style>